auriculoventricular vs ventricle

auriculoventricular is not a noun while ventricle is a noun.

Word	Noun	Adjective	Verb	Adverb
auriculoventricular	No	Yes	No	No
ventricle	Yes	No	No	No

auriculoventricular (noun)	ventricle (noun)
	a chamber of the heart that receives blood from an atrium and pumps it to the arteries
	one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid

auriculoventricular (adjective)	ventricle (adjective)
relating to or affecting the atria and ventricles of the heart